Outcomes of Total Elbow Arthroplasty for Rheumatoid Arthritis: Comparative Study of Three Implants

Abstract

The clinical function of these implants was similar in terms of pain relief and range of motion. We believe that component linkage with the Coonrad-Morrey implant prevents dislocation without increasing the risk of loosening.

The effect of elbow joint centre displacement on force generation and neural excitation

“…Elbow joint centre displacement has been examined previously along the flexion-extension axis at a single joint angle [26], and dramatic variations in predicted muscle forces and joint reaction force were reported. This study examined elbow joint centre displacement along the proximal-distal and anterior-posterior axes, which has reported clinically due to aseptic loosening [21,28], while also including the interaction with the neural system.…”

“…An anterior tilt of the humeral component, and hence a posterior displacement of the joint centre has been found to be typical of aseptic loosening [21,28]; for this reason three posterior displacements were examined in this study, P1-P3. One anterior displacement was also simulated, P4, to account for the possibility of a posterior tilt of the humeral component or anterior surgical misalignment.…”

“…One anterior displacement was also simulated, P4, to account for the possibility of a posterior tilt of the humeral component or anterior surgical misalignment. Clinically, radiolucent lines greater than 2 mm in thickness have been used to define aseptic loosening [21,28], in this study a movement of 5 mm was simulated. Displacements of this order of magnitude have been measured surgically [29].…”

The History and Future of Unlinked Total Elbow Arthroplasty

“…Although the loosening rate of unlinked prostheses should theoretically be lower than that of linked prostheses, there has been no definite evidence of this in clinical studies. [5][6][7] A number of designs of unlinked TEA prostheses have been developed and employed. The capitellocondylar implant is one of the most studied and widely used unlinked elbow prostheses.…”

“…23 There are few studies comparing the outcomes of different unlinked TEA prostheses. Little et al 6 compared the outcome of the Souter, Kudo, and Coonrad-Morrey designs in a prospective cohort study based on the year of surgery. At an average follow-up time of 5 years, all three implants relieved pain, and the improvements in the range of motion were comparable among the three groups.…”